I own an ASUS P8Z77-V Pro and created a DSDT.aml, all that I've done is cleaned up the warning and remarks and added a method dgtp and hdef patch for realtek 892. It's based off the modded 1616 firmware from the asus repository thread.
Here it is if you so desire, but it's really unnecessary as pointed out, you can just use the hdaenabler1.kext